We're going to solve 3878 multiplied by 1258
3878 × 1258 = 1258 × (3878)
+ 1258 × 8 that equals 10064
+ 1258 × 70 resulting in 88060
+ 1258 × 800 giving us 1006400
+ 1258 × 3000 yielding 3774000

= 4878524
